I know, in order to achieve best print results in CMYK, you should set the CYM values to something other than 0 and then set K to 100. This will produce a deeper, purer black. Simply C0 M0 Y0 K100 will print as a duller black. Here's the question. The design program I'm using only designs in CMYK colors. However, some of the project is going to be printed in one-color (grayscale). For the one-color prints, will there be any visible difference between my CMYK mixed black and just K=100?